Pycurl

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* Add CURLOPT_REQUEST_TARGET option (patch by Marcel Brouwers).
* Add missing 2nd parameters to METH_NOARGS functions
(patch by Scott Talbert).
* Add CURLOPT_AWS_SIGV4 option (patch by Scott Talbert).
* Add consistent names for newer Curl version constants
(patch by Scott Talbert).
* Only run HTTP version 3 option constant test if curl supported
(patch by Scott Talbert).
* Expose COMPILE_SSL_LIB in Python and use for test filtering
(patch by Scott Talbert).
* Filter tests based on *compile* libcurl version not runtime version
(patch by Scott Talbert).
* Use print function in callbacks documentation
(patch by Scott Talbert).
* Add missing shebang to tests/ext/test-suite.sh
(patch by Scott Talbert).
* Officially declare support for Python 3.12
(patch by Scott Talbert).
* Fix curl_multi_info_read flow that loses messages
(patch by Dom Sekotill).
* Support using environment variables for setup on Windows
(patch by Scott Talbert).
* Add support for Schannel SSL backend (patch by Scott Talbert)
* Skip HTTP2 tests based on a curl support check
(patch by Scott Talbert).
* Fix fake-curl tests so they work when run out of tree
(patch by Scott Talbert).
* xfail test_easy_pause_unpause unconditionally
(patch by Scott Talbert).
* Provide generic error strings in pycurl.error objects
(patch by Scott Talbert).
* Change URLs to new curl mailing list (patch by Michael C).
* Add missing HTTPS proxy options (patch by Jean Hominal).
* Add support for setting CURLOPT_SSLCERT_BLOB
(patch by Vesa Jääskeläinen).
* Add support for setting rest of CURLOPTTYPE_BLOB fields
(patch by Vesa Jääskeläinen).
* Build wheels on Linux/macOS/Windows (patch by Scott Talbert).

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* Python 3.9 compatibility for Py_TRASHCAN_SAFE_BEGIN
(patch by Scott Talbert).
* Add support for CURL_HTTP_VERSION_3 (patch by Scott Talbert).
* Add CURLOPT_TLS13_CIPHERS and CURLOPT_PROXY_TLS13_CIPHERS options
(patch by Scott Talbert).
* Added HTTP09_ALLOWED option (patch by Scott Talbert).
* Removed use of distutils (patch by Scott Talbert).

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* Fixed build against libcurl < 7.64.1 (patch by Scott Talbert).

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* Add CURLOPT_MAXLIFETIME_CONN (patch by fsbs).

* Easy handle duplication support (patch by fsbs).

* Support for unsetting a number of multi options (patch by fsbs).

* pycurl classes can now be subclassed (patch by fsbs).

* Multi callbacks' thread state management fixed (patch by fsbs).

* Add CURL_LOCK_DATA_PSL (patch by fsbs).

* Add support for SecureTransport SSL backend (MacOS)
(patch by Scott Talbert).

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* Fixed Python thread initialization causing hangs on operations
(patch by Scott Talbert).

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* getinfo(CURLINFO_FTP_ENTRY_PATH) now handles NULL return from
libcurl, returning None in this case.

* Python 3.9 is now officially supported (patch by Bill Collins).

* Added CURLOPT_DOH_URL (patch by resokou).

* Best effort Python 2 support has been reinstated.

* Added missing fields to curl_version_info struct (patch by Hasan).

* Added CURLINFO_CONDITION_UNMET (patch by Dima Tisnek).

* Exposed MAX_CONCURRENT_STREAMS in CurlMulti (patch by Alexandre Pion).

* Compilation fixed against Python 3.10 alpha (patch by Kamil Dudka).